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Tcl1 coordinately promotes metabolic shift and regulates totipotency exit
Xin Gao1, Chen Gao1,2, Yikai Shi1
1State Key Laboratory of Animal Biotech Breeding, Frontiers Science Center for Molecular Design Breeding (MOE), College of Biological Sciences, China Agricultural University, Beijing 100193, China.
Life Medicine
|May 16, 2025
Summary
Tcl1 regulates early embryonic cell fate transitions by controlling energy metabolism. Its absence suppresses glycolysis and promotes totipotency, while the Tcl1-AKT-succinate axis governs pluripotency.
Area of Science:
- Developmental Biology
- Metabolic Regulation
- Epigenetics
Background:
- Energy metabolism is critical for cell fate determination during early embryonic development.
- The specific regulators of metabolic shifts during the totipotency-pluripotency transition are not fully understood.
Purpose of the Study:
- To investigate the role of Tcl1 in regulating energy metabolism and the totipotency-pluripotency transition.
- To elucidate the molecular mechanisms underlying Tcl1's function in cell fate determination.
Main Methods:
- Gene knockout studies to assess Tcl1's absence.
- Analysis of gene expression for totipotency markers and glycolytic enzymes.
- Chromatin immunoprecipitation to examine H3K4me3 modifications.
- Biochemical assays to measure metabolic intermediates like succinate.
Main Results:
- Absence of Tcl1 upregulates totipotency genes and suppresses glycolysis via reduced H3K4me3 modifications at glycolytic enzyme promoters.
- Reduced AKT, a Tcl1 target, correlates with 2C gene activation and metabolic shifts.
- AKT inhibition causes succinate accumulation, indicating its role in cell fate transition.
Conclusions:
- Tcl1 is a key regulator of energy metabolism during the totipotency-pluripotency transition.
- The Tcl1-AKT-succinate axis coordinates metabolic pathways to control cell fate in early embryonic development.
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